ErrorException [ Fatal Error ]: Class 'Kohana_Config_Group' not found

APPPATH/kohana/system/classes/Config/Group.php [ 3 ]

1 <?php defined('SYSPATH') OR die('No direct script access.');
2 
3 class Config_Group extends Kohana_Config_Group {}

1. {
   Fatal error: Call to undefined function __() in /var/www/19218-saniyaw/data/www/board.flexi-soft.in.ua/oc/kohana/system/views/kohana/error.php on line 64